pgsql: Reset walsender ps title in the main loop

Reset walsender ps title in the main loop

When in streaming mode we can never get out, so it will never
be required, but after a base backup (or other operations)
we can get back to the loop, so the title needs to be cleared.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=b7ebda9d8c6f78b3bb31247531d0ef0e64b32a16

Modified Files
--------------
src/backend/replication/walsender.c |    2 ++
1 files changed, 2 insertions(+), 0 deletions(-)